package com.example.arvin.testingexample;

/**
 * Created by Arvin on 2016/5/19.
 */
public class Calculator {
    public double sum(double a, double b) {
        return a + b;
    }

    public double substract(double a, double b) {
        return 0;
    }

    public double divide(double a, double b) {
        return 0;
    }

    public double multiply(double a, double b) {
        return 0;
    }
}
